Elevated Temperature Mechanical Properties of a Directionally Solidified NiAl/Cr(Mo)-Hf Alloy

Chun Mei Xu; Jian Ting Guo; Xi Shan Xie

doi:10.4028/www.scientific.net/KEM.297-300.1477

Paper Titles

Comparison of Creep Behavior of 2.25Cr-1.6W/Mod. 9Cr-1Mo Dissimilar Weld Joint with Each Matching Filler Metal
p.1452

High Temperature Creep, Fatigue and Creep/Fatigue Interaction Behavior of γ' Strengthened Austenitic Iron-Base Superalloy
p.1458

On the Creep Fracture Toughness of 2¼Cr1Mo Steel
p.1464

Evaluation of DBTT and Creep Properties of Aged Main Valve Casing by Using Small Punch Specimens
p.1470

Elevated Temperature Mechanical Properties of a Directionally Solidified NiAl/Cr(Mo)-Hf Alloy
p.1477

Tensile Behavior of 17-4PH Stainless Steel under Rapid Heating
p.1482

Experimental Study of the High Temperature Mechanical Behaviors of TLP Bonding of Two Ni-Base Single Crystals
p.1489

Characterization of High Temperature Thermomechanical Fatigue Properties for Particle Reinforced Composites
p.1495

Strength Characteristics and Deformation Behavior of Aluminum Honeycomb Sandwich Plates under Three-Point Bending Loads
p.1503

HomeKey Engineering MaterialsKey Engineering Materials Vols. 297-300Elevated Temperature Mechanical Properties of a...

Elevated Temperature Mechanical Properties of a Directionally Solidified NiAl/Cr(Mo)-Hf Alloy

Abstract:

The microstructure of directionally solidified (DS) NiAl-28Cr-5Mo-1Hf eutectic alloy was investigated by SEM and TEM. The eutectic alloy is composed of NiAl matrix , Cr (Mo) phase and a small amount of Heusler phase. Tensile testing of this alloy was performed from room temperature to 1373K. The brittle-to-ductile transition temperature (BDTT) is dependent on strain rate, with two orders of increase on strain rate resulting in a100K increase in transition temperature. The observation of fracture surface showed that at temperature above BDTT, the fractograph changes from NiAl cleavage and debonding along NiAl/Cr(Mo) interface boundary to ductile in nature.

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Key Engineering Materials (Volumes 297-300)

Pages:

1477-1481

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.297-300.1477

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Online since:

November 2005

Authors:

Chun Mei Xu, Jian Ting Guo, Xi Shan Xie

Keywords:

Brittle-to-Ductile Transition Temperature (BDTT), Fracture Morphology, Microstructure, NiAl/Cr(Mo)-Hf Alloy

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